Arm for a seat



FIG. 1 is a perspective view of an arm for a seat showing my new design;

FIG. 2 is an outer side view of the arm for a seat;

FIG. 3 is a top view of the arm for a seat;

FIG. 4 is a front view of the arm for a seat;

FIG. 5 is a back view of the arm for a seat;

FIG. 6 is an inner side view of the arm for a seat; and,

FIG. 7 is a bottom view of the arm for a seat.

The ornamental design for an arm for a seat, as shown and described.